Originally the Philosopher's Stone was believed to be the
chemical that changed base metals into silver or gold, often it was termed
the Power of Projection.

It was first mentioned by Zosimos
the Theban (c. 250-300) in the third century. Throughout the generations
the Philosopher's Stone has taken on an immense range of powers; not only
has it been called the secret of life and health, but also possessing spiritual
significance. The notion of its spiritual qualities expanded until in the
thirteenth century a program evolved that led the alchemist through a strict
devotional ritual and purification. After completing this ceremony he was
thought worthy to perform his activities.

Eventually the Philosopher's Stone was thought to signify the force behind
the evolution of life and the universal binding power which unites minds
and souls in a human oneness.

Finally, it represented the purity and sanctity of the highest realm
of pure thought and altruistic existence. A.G.H.